Reflector Audio
A pair of Square Two monitors with brass baffles, mounted above black bass cabinets in a recording studio control room
Square Two — Active coaxial studio monitor {{ heroDims }}

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Four 5-inch woofers and a 1.4-inch compression driver share a single acoustic axis inside a 320 millimetre cube. Directivity holds at 64 degrees, horizontally and vertically, across 1 to 10 kHz.

01 — Object

The whole front of the cabinet is a horn.

Four 5-inch Eighteen Sound woofers sit on a sub-baffle deeper in the housing and radiate through four openings arranged concentrically on the horn surface. A 1.4-inch Faital compression driver occupies the centre. Both paths leave the cabinet on one axis, so at short listening distances the monitor behaves as a single source rather than two.

Bass reflex ports exit through the underside. The base plate carries wide feet front and back to set the distance from the surface below.

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Square Two in gloss black on a workbench Square Two baffle in gloss white, angled Square Two with brass baffle in a control room
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Finishes shown are existing units
02 — Listener

Directivity is what the listener notices first and can name last.

Because the baffle is square and the arrangement concentric, horizontal and vertical behaviour are identical. Above 600 Hz the pattern opens to roughly 120 degrees, narrows to about 90 from 1 kHz, and to near 50 above 2 kHz.

Spectrogram and step response measurements of the Square Two
Spectrogram and step response — measured Explore directivity →
03 — Room

A narrow pattern trades movement for silence.

Restricted dispersion limits freedom of movement at close distances. In exchange, fewer reflections return from the surroundings and less diffuse energy reaches the listening position. The measured behaviour points to a listening distance of three to four metres.

Plan a room
A pair of gloss black Square Two monitors facing one another
Acoustic axis
04 — Series
Full specifications on request
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Enquire →
Technology

One axis, four ports, fifteen filters.

The Square Two is a two-way active bass reflex design with coaxial alignment. The separation between paths occurs at 1 kHz. What follows is drawn from published measurement, not from claims.

The Square Two driver assembly with four woofers around a central compression driver on a cast frame
01 — Coaxial arrangement

Woofers that fire through the horn

The four low-frequency drivers are mounted on a sub-baffle set back inside the cabinet. They radiate forward through four openings placed concentrically around the outer surface of the horn, each opening acting as the mouth of a bandpass chamber. The compression driver sits at the centre of the same horn.

That arrangement is why four 5-inch cones reach a sensitivity high enough to stay level-matched with a 1.4-inch compression driver, and why the two paths measure as one source.

02 — Dispersion

Move across the band

Move the cursor horizontally — plan view, −6 dB contour
SOURCE ON AXIS 0° 64° NOMINAL, 1–10 kHz
Frequency
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Interpolated from published isobar and Spinorama data. Horizontal and vertical planes are identical.

03 — Phase and filtering

Linear phase without FIR

Phase linearity is reached from approximately 200 Hz upward. It is achieved with a combination of bell, shelf and all-pass filters rather than the FIR filters usually employed for the purpose — up to fifteen BiQuads per path, which the Hypex DSP platform carries without difficulty.

The measured step response shows a clean leading edge with no precursor and an even decay. Ripple across 100 Hz to 10 kHz is 2.6 dB.

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04 — Amplification, conversion, control
Rear panel of the Square Two showing analogue, AES and S/PDIF connectors

Everything on one plate

Power amplifiers and DSP come from Hypex. A two-channel Ncore module rated 2 × 125 W drives the four woofers; a 100 W extension module supplies the compression driver. A Sigma DSP handles filtering and crossover.

Analogue inputs are XLR and RCA. Digital inputs are AES/EBU and S/PDIF, each with a link socket, plus optical Toslink. Ten user-definable filters can be stored across three setups over USB.

Despite the compact cabinet, the electronics occupy their own inner housing that isolates the boards from vibration.
Square Two monitors in a studio control room
Studio applications

Nearfield to midfield to mastering.

One cabinet covers three working distances. What changes between them is the room's share of what you hear — and the Square Two's narrow, symmetrical pattern is what makes that share predictable.

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Integration

Whatever the room already speaks

Analogue and digital inputs sit side by side on the rear plate, each digital format carrying its own link socket so a pair can be daisy-chained from a single source without a splitter. Filter setups are stored in the monitor, which means a room correction travels with the cabinet rather than the console.

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Rear connection plate of the Square Two
Listening environments

The room is the second half of the instrument.

Set the dimensions, move the listening position, and read the geometry. Reflection points are calculated by the image-source method against the −6 dB coverage of the Square Two.

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Plan view — front wall at top

Geometric model only. First-order side and front wall reflections, rigid boundaries, no absorption or furniture accounted for.

Installations

Reference images from existing installations
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Technical specifications

Square Two

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Provenance

Measured values reproduced from the Square Two review published in Sound & Recording, June 2023. Measurements by Anselm Goertz.

Method

Class 1 measuring room, free field from 100 Hz. G.R.A.S. 1/4″ 46BF microphone at 96 kHz and 24 bit, WinMF. Below 100 Hz, combined near-field and far-field measurement.

Enquiries

Distributor and dealer documentation, including full measurement sets, is available on request.
Configure and acquire

Specify the pair, then the room.

Square Two in gloss black Square Two baffle in gloss white Square Two with brass baffle
Square Two — {{ finishName }}

Square Two

Active two-way coaxial studio monitor. 320 millimetre cube, 19.4 kg. Analogue and digital inputs, on-board DSP, three storable setups.

Finish
Quantity
Indicative — not a quotation
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Confirmed at order
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Reflector Audio

Active loudspeaker systems engineered for the rooms they occupy. Made in Latvia.

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© Reflector Audio Prototype — pricing indicative, not a quotation